Display screen portion with an animated graphical user interface



FIG. 1 is a front view of a first image in a sequence for a display screen portion with an animated graphical user interface, showing our new design;

FIG. 2 is a second image in the sequence thereof;

FIG. 3 is a third image in the sequence thereof; and,

FIG. 4 is a fourth image in the sequence thereof.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-4. The process or period in which one image transitions to another image forms no part of the claimed design.

The broken lines showing a portion of a display screen and portions of the animated graphical user interface, in FIGS. 1-4 form no part of the claimed design. 

CLAIM The ornamental design for a display screen portion with an animated graphical user interface, substantially as shown and described. 